Which three items can serve as inputs to a microcontroller unit such as an Arduino? (Choose three.)

Which three items can serve as inputs to a microcontroller unit such as an Arduino? (Choose three.)

• a sensor
• an LED
• a pushbutton
• a Twitter message
• an actuator
• a relay

Explanation: Microcontroller units, such as the Arduino, can be set up to monitor and respond to events. The events serve as inputs to the microcontroller. Examples of these events are a change in the amount of light detected by a light sensor, the press of a pushbutton, or receiving an Internet message, such as a tweet from Twitter.

Exam with this question: IoT Connecting Things 2.0 – Chapter 2 Quiz Answers